The WMC-0.3-8-30dB-S from Werbel Microwave is a Directional Coupler with Frequency 0.3 to 8 GHz, Coupling 30 dB, Coupling Variation ±2.0 dB, Frequency Sensitivity ±0.6 to ±1.2 dB, Directivity 14 to 23 dB. Tags: Module with Connectors. More details for WMC-0.3-8-30dB-S can be seen below.